Donald Ervin Knuth, (born January 10, 1938) is a renowned computer
scientist and professor emeritus at Stanford University.

Knuth is best known as the author of the multi-volume The Art of Computer
Programming, one of the most highly respected references in the computer
science field. He practically created the field of rigorous analysis of
algorithms, and made many seminal contributions to several branches of
theoretical computer science. He is the creator of the TEX
typesetting system and of the METAFONT font design system, and pioneered the
concept of literate programming.

Knuth pays a finder's fee of $2.56 for any typos/mistakes discovered in his
books, because "256 pennies is one hexadecimal dollar". (His bounty for
errata in 3:16 Bible Texts Illuminated, is, however, $3.16). According to
an article in MIT's Technology Review, these reward checks are "among
computerdom's most prized trophies".